When a player specific player attempts to name a diamond backpack for the first time on the server it caused them to crash, the same player had a identical crash on another server with only a few similar mods, namely forge and tinkers construct (probably different versions even) however it only seams to have happened to that 1 player so far, i am only aware of that 1 person. i have no received a crash report from them to go into more specifics but it could be something to look into, if it occurs more or i do get a report ill try and update the post.

Affected Versions (Do not use "latest"):

• IronBackpacks: 1.10.2-2.2.27
• Minecraft: 1.10.2
• Forge: 1.10.2-12.18.3.2316
• Other Conflicting Mods (may be irrelevant to your issue):

We can't do anything without a log.

I apologize for not responding sooner, i was able to get a crash report from the player today after they joined yet another 1 of our servers and crashed yet again from iron backpacks, ill post the crash report.
crash-2017-07-10_15.36.59-client.txt

Dupe of #178